Synthesis, Characterization, and Crystal Structure of Thallium(I) Complex containing Monodeprotonated 2,6‐Pyridinedicarboxylic Acid

Abstract

The reaction of an ethanolic solution 2,6‐pyridinedicarboxylic acid (1, LH2) with TlNO3 in the presence of triethylamine led to the coordination polymer [Tl(LH)]n (2). The complex was characterized by elemental analysis, IR spectroscopy and single‐crystal X‐ray diffraction. Crystal data for 2 at –80 °C: monoclinic, space group I2/a, a = 696.1(1), b = 1190.6(2), c = 931.0(2) pm, β = 103.28(1)°, Z = 4, R1 = 0.0256.

Crystallochemical formula as a tool for describing metal–ligand complexes – a pyridine-2,6-dicarboxylate example

“…Let us stress that the name of the compound in IUPAC terms can be derived easily if the chemical and crystallochemical formulae of the complex are found, but not vice versa. This point can be illustrated by using the aforementioned Tl(HPydc) (WARYEU; Rafizadeh et al, 2005), [Bi(Pydc)Cl(H 2 O)] (MIPLUS; Ranjbar et al, 2001) and [Ho(Pydc)(HPydc)] (QUPSUP; Fernandes et al, 2001) compounds. The complexes have the following CCFs: AT 201 , AK 201 M 1 M 01 and AP 201 T 001 , respectively, and include tri-, tetra-and pentadentate Pydc ions (Fig.…”

“…Schematic representation of complex ions in the structures of (a) Tl(HPydc) (WARYEU; Rafizadeh et al, 2005), (b) [Bi(Pydc)Cl(H 2 O)] (MIPLUS; Ranjbar et al, 2001) and (c) [Ho(Pydc)(HPydc)] (QUPSUP; Fernandes et al, 2001). The right column represents pyridine-2,6dicarboxylate ions with m 3 coordination (in accordance with IUPAC rules) as full circles.…”

“…The subscript does not usually coincide with the denticity of a ligand. For example, in the structures of Tl(HPydc) (WARYEU; Rafizadeh et al, 2005), [Bi(Pydc)Cl(H 2 O)] (MIPLUS; Ranjbar et al, 2001) and [Ho(Pydc)(HPydc)] (QUPSUP; Fernandes et al, 2001) the Pydc ions are 3 ligands (according to IUPAC recommendations; Connelly et al, 2005), but also tri-, tetra-and pentadentate ones, respectively. From hereon, the Refcode of a compound in the Cambridge Structural Database (CSD; Allen, 2002) is given in parentheses.…”

Crystal structure of catena-[(μ2-aqua)(μ2-pyridine-2,6-dicarboxylato)- (nitrato)cadmium(II)], Cd(H2O)(C7H4O4N)(NO3)

“…The interest in this ligand centers on the versatile yet unpredictable manner in which it coordinates to a wide variety of metals. It is known to coordinate as the neutral molecule (H 2pydc), the univalent anion (Hpydc -) [2], and the divalent anion (pydc 2-) [3]. Sometimes it functions as abidentate ligand, sometimes as ab ridging ligand [4], and frequently as a meridional tridentate ligand.…”

Hemipiperazinediium bis(pyridine-2,6-dicarboxylato-κ3O,N,O′)gallate(III) pyridine-2,6-dicarboxylic acid dihydrate

“…For self-assembling systems involving pydcH 2 , see: Aghabozorg et al (2006a,b). For related complexes of the pyridine-2,6dicarboxylate ligand with transition metals, see: Rafizadeh et al (2005Rafizadeh et al ( , 2006; Rafizadeh & Amani (2006); Aghabozorg et al (2007,2008). For details of the synthesis, see: Sheshmani et al (2006).…”